I really love the name Kella for a girl, it's one of my guilty pleasure names. Not really sure how it would be received, afraid people would automatically assume the name is supposed to be Kellie or Kelly.

You're kidding! I love Hilary! Nice to know someone doesn't think of Mrs. Clinton.
I like Winifred, Dorothy, Agnes, Vincent, Macalester, and a ton of other vintage names, but these are ones that people seem to hate the most.
Also, I love a ton of uber-popular names, such as Olivia, Sophia, and Ava.